/drivers/staging/cx25821/cx25821-videoioctl.c
C | 496 lines | 392 code | 75 blank | 29 comment | 83 complexity | bbeddda21e52d26ca0529525a7f63903 MD5 | raw file
- /*
- * Driver for the Conexant CX25821 PCIe bridge
- *
- * Copyright (C) 2009 Conexant Systems Inc.
- * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
- * Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include "cx25821-video.h"
- static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
- {
- struct cx25821_buffer *buf =
- container_of(vb, struct cx25821_buffer, vb);
- struct cx25821_buffer *prev;
- struct cx25821_fh *fh = vq->priv_data;
- struct cx25821_dev *dev = fh->dev;
- struct cx25821_dmaqueue *q = &dev->vidq[VIDEO_IOCTL_CH];
- /* add jump to stopper */
- buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
- buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
- buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
- dprintk(2, "jmp to stopper (0x%x)\n", buf->risc.jmp[1]);
- if (!list_empty(&q->queued)) {
- list_add_tail(&buf->vb.queue, &q->queued);
- buf->vb.state = VIDEOBUF_QUEUED;
- dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf,
- buf->vb.i);
- } else if (list_empty(&q->active)) {
- list_add_tail(&buf->vb.queue, &q->active);
- cx25821_start_video_dma(dev, q, buf,
- &dev->sram_channels[VIDEO_IOCTL_CH]);
- buf->vb.state = VIDEOBUF_ACTIVE;
- buf->count = q->count++;
- mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
- dprintk(2,
- "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
- buf, buf->vb.i, buf->count, q->count);
- } else {
- prev =
- list_entry(q->active.prev, struct cx25821_buffer, vb.queue);
- if (prev->vb.width == buf->vb.width
- && prev->vb.height == buf->vb.height
- && prev->fmt == buf->fmt) {
- list_add_tail(&buf->vb.queue, &q->active);
- buf->vb.state = VIDEOBUF_ACTIVE;
- buf->count = q->count++;
- prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
- /* 64 bit bits 63-32 */
- prev->risc.jmp[2] = cpu_to_le32(0);
- dprintk(2,
- "[%p/%d] buffer_queue - append to active, buf->count=%d\n",
- buf, buf->vb.i, buf->count);
- } else {
- list_add_tail(&buf->vb.queue, &q->queued);
- buf->vb.state = VIDEOBUF_QUEUED;
- dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf,
- buf->vb.i);
- }
- }
- if (list_empty(&q->active)) {
- dprintk(2, "active queue empty!\n");
- }
- }
- static struct videobuf_queue_ops cx25821_video_qops = {
- .buf_setup = buffer_setup,
- .buf_prepare = buffer_prepare,
- .buf_queue = buffer_queue,
- .buf_release = buffer_release,
- };
- static int video_open(struct file *file)
- {
- int minor = video_devdata(file)->minor;
- struct cx25821_dev *h, *dev = NULL;
- struct cx25821_fh *fh;
- struct list_head *list;
- enum v4l2_buf_type type = 0;
- u32 pix_format;
- lock_kernel();
- list_for_each(list, &cx25821_devlist) {
- h = list_entry(list, struct cx25821_dev, devlist);
- if (h->ioctl_dev && h->ioctl_dev->minor == minor) {
- dev = h;
- type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- }
- }
- if (NULL == dev) {
- unlock_kernel();
- return -ENODEV;
- }
- printk("open minor=%d type=%s\n", minor, v4l2_type_names[type]);
- /* allocate + initialize per filehandle data */
- fh = kzalloc(sizeof(*fh), GFP_KERNEL);
- if (NULL == fh) {
- unlock_kernel();
- return -ENOMEM;
- }
- file->private_data = fh;
- fh->dev = dev;
- fh->type = type;
- fh->width = 720;
- if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
- fh->height = 576;
- else
- fh->height = 480;
- dev->channel_opened = VIDEO_IOCTL_CH;
- pix_format = V4L2_PIX_FMT_YUYV;
- fh->fmt = format_by_fourcc(pix_format);
- v4l2_prio_open(&dev->prio, &fh->prio);
- videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
- &dev->pci->dev, &dev->slock,
- V4L2_BUF_TYPE_VIDEO_CAPTURE,
- V4L2_FIELD_INTERLACED,
- sizeof(struct cx25821_buffer), fh);
- dprintk(1, "post videobuf_queue_init()\n");
- unlock_kernel();
- return 0;
- }
- static ssize_t video_read(struct file *file, char __user * data, size_t count,
- loff_t * ppos)
- {
- struct cx25821_fh *fh = file->private_data;
- switch (fh->type) {
- case V4L2_BUF_TYPE_VIDEO_CAPTURE:
- if (res_locked(fh->dev, RESOURCE_VIDEO_IOCTL))
- return -EBUSY;
- return videobuf_read_one(&fh->vidq, data, count, ppos,
- file->f_flags & O_NONBLOCK);
- default:
- BUG();
- return 0;
- }
- }
- static unsigned int video_poll(struct file *file,
- struct poll_table_struct *wait)
- {
- struct cx25821_fh *fh = file->private_data;
- struct cx25821_buffer *buf;
- if (res_check(fh, RESOURCE_VIDEO_IOCTL)) {
- /* streaming capture */
- if (list_empty(&fh->vidq.stream))
- return POLLERR;
- buf = list_entry(fh->vidq.stream.next,
- struct cx25821_buffer, vb.stream);
- } else {
- /* read() capture */
- buf = (struct cx25821_buffer *)fh->vidq.read_buf;
- if (NULL == buf)
- return POLLERR;
- }
- poll_wait(file, &buf->vb.done, wait);
- if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR)
- return POLLIN | POLLRDNORM;
- return 0;
- }
- static int video_release(struct file *file)
- {
- struct cx25821_fh *fh = file->private_data;
- struct cx25821_dev *dev = fh->dev;
- /* stop video capture */
- if (res_check(fh, RESOURCE_VIDEO_IOCTL)) {
- videobuf_queue_cancel(&fh->vidq);
- res_free(dev, fh, RESOURCE_VIDEO_IOCTL);
- }
- if (fh->vidq.read_buf) {
- buffer_release(&fh->vidq, fh->vidq.read_buf);
- kfree(fh->vidq.read_buf);
- }
- videobuf_mmap_free(&fh->vidq);
- v4l2_prio_close(&dev->prio, &fh->prio);
- file->private_data = NULL;
- kfree(fh);
- return 0;
- }
- static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
- {
- struct cx25821_fh *fh = priv;
- struct cx25821_dev *dev = fh->dev;
- if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
- return -EINVAL;
- }
- if (unlikely(i != fh->type)) {
- return -EINVAL;
- }
- if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO_IOCTL)))) {
- return -EBUSY;
- }
- return videobuf_streamon(get_queue(fh));
- }
- static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
- {
- struct cx25821_fh *fh = priv;
- struct cx25821_dev *dev = fh->dev;
- int err, res;
- if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
- if (i != fh->type)
- return -EINVAL;
- res = get_resource(fh, RESOURCE_VIDEO_IOCTL);
- err = videobuf_streamoff(get_queue(fh));
- if (err < 0)
- return err;
- res_free(dev, fh, res);
- return 0;
- }
- static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- struct cx25821_fh *fh = priv;
- struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
- int err;
- if (fh) {
- err = v4l2_prio_check(&dev->prio, &fh->prio);
- if (0 != err)
- return err;
- }
- dprintk(2, "%s()\n", __func__);
- err = vidioc_try_fmt_vid_cap(file, priv, f);
- if (0 != err)
- return err;
- fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
- fh->width = f->fmt.pix.width;
- fh->height = f->fmt.pix.height;
- fh->vidq.field = f->fmt.pix.field;
- dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
- fh->height, fh->vidq.field);
- cx25821_call_all(dev, video, s_fmt, f);
- return 0;
- }
- static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
- {
- struct cx25821_fh *fh = priv;
- return videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
- }
- static long video_ioctl_set(struct file *file, unsigned int cmd,
- unsigned long arg)
- {
- struct cx25821_fh *fh = file->private_data;
- struct cx25821_dev *dev = fh->dev;
- struct downstream_user_struct *data_from_user;
- int command;
- int width = 720;
- int selected_channel = 0, pix_format = 0, i = 0;
- int cif_enable = 0, cif_width = 0;
- u32 value = 0;
- data_from_user = (struct downstream_user_struct *)arg;
- if (!data_from_user) {
- printk("cx25821 in %s(): User data is INVALID. Returning.\n",
- __func__);
- return 0;
- }
- command = data_from_user->command;
- if (command != SET_VIDEO_STD && command != SET_PIXEL_FORMAT
- && command != ENABLE_CIF_RESOLUTION && command != REG_READ
- && command != REG_WRITE && command != MEDUSA_READ
- && command != MEDUSA_WRITE) {
- return 0;
- }
- switch (command) {
- case SET_VIDEO_STD:
- dev->tvnorm =
- !strcmp(data_from_user->vid_stdname,
- "PAL") ? V4L2_STD_PAL_BG : V4L2_STD_NTSC_M;
- medusa_set_videostandard(dev);
- break;
- case SET_PIXEL_FORMAT:
- selected_channel = data_from_user->decoder_select;
- pix_format = data_from_user->pixel_format;
- if (!(selected_channel <= 7 && selected_channel >= 0)) {
- selected_channel -= 4;
- selected_channel = selected_channel % 8;
- }
- if (selected_channel >= 0)
- cx25821_set_pixel_format(dev, selected_channel,
- pix_format);
- break;
- case ENABLE_CIF_RESOLUTION:
- selected_channel = data_from_user->decoder_select;
- cif_enable = data_from_user->cif_resolution_enable;
- cif_width = data_from_user->cif_width;
- if (cif_enable) {
- if (dev->tvnorm & V4L2_STD_PAL_BG
- || dev->tvnorm & V4L2_STD_PAL_DK)
- width = 352;
- else
- width = (cif_width == 320
- || cif_width == 352) ? cif_width : 320;
- }
- if (!(selected_channel <= 7 && selected_channel >= 0)) {
- selected_channel -= 4;
- selected_channel = selected_channel % 8;
- }
- if (selected_channel <= 7 && selected_channel >= 0) {
- dev->use_cif_resolution[selected_channel] = cif_enable;
- dev->cif_width[selected_channel] = width;
- } else {
- for (i = 0; i < VID_CHANNEL_NUM; i++) {
- dev->use_cif_resolution[i] = cif_enable;
- dev->cif_width[i] = width;
- }
- }
- medusa_set_resolution(dev, width, selected_channel);
- break;
- case REG_READ:
- data_from_user->reg_data = cx_read(data_from_user->reg_address);
- break;
- case REG_WRITE:
- cx_write(data_from_user->reg_address, data_from_user->reg_data);
- break;
- case MEDUSA_READ:
- value =
- cx25821_i2c_read(&dev->i2c_bus[0],
- (u16) data_from_user->reg_address,
- &data_from_user->reg_data);
- break;
- case MEDUSA_WRITE:
- cx25821_i2c_write(&dev->i2c_bus[0],
- (u16) data_from_user->reg_address,
- data_from_user->reg_data);
- break;
- }
- return 0;
- }
- static int vidioc_log_status(struct file *file, void *priv)
- {
- struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
- char name[32 + 2];
- snprintf(name, sizeof(name), "%s/2", dev->name);
- printk(KERN_INFO "%s/2: ============ START LOG STATUS ============\n",
- dev->name);
- cx25821_call_all(dev, core, log_status);
- printk(KERN_INFO "%s/2: ============= END LOG STATUS =============\n",
- dev->name);
- return 0;
- }
- static int vidioc_s_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctl)
- {
- struct cx25821_fh *fh = priv;
- struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
- int err;
- if (fh) {
- err = v4l2_prio_check(&dev->prio, &fh->prio);
- if (0 != err)
- return err;
- }
- return 0;
- }
- // exported stuff
- static const struct v4l2_file_operations video_fops = {
- .owner = THIS_MODULE,
- .open = video_open,
- .release = video_release,
- .read = video_read,
- .poll = video_poll,
- .mmap = video_mmap,
- .ioctl = video_ioctl_set,
- };
- static const struct v4l2_ioctl_ops video_ioctl_ops = {
- .vidioc_querycap = vidioc_querycap,
- .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
- .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
- .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
- .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
- .vidioc_reqbufs = vidioc_reqbufs,
- .vidioc_querybuf = vidioc_querybuf,
- .vidioc_qbuf = vidioc_qbuf,
- .vidioc_dqbuf = vidioc_dqbuf,
- #ifdef TUNER_FLAG
- .vidioc_s_std = vidioc_s_std,
- .vidioc_querystd = vidioc_querystd,
- #endif
- .vidioc_cropcap = vidioc_cropcap,
- .vidioc_s_crop = vidioc_s_crop,
- .vidioc_g_crop = vidioc_g_crop,
- .vidioc_enum_input = vidioc_enum_input,
- .vidioc_g_input = vidioc_g_input,
- .vidioc_s_input = vidioc_s_input,
- .vidioc_g_ctrl = vidioc_g_ctrl,
- .vidioc_s_ctrl = vidioc_s_ctrl,
- .vidioc_queryctrl = vidioc_queryctrl,
- .vidioc_streamon = vidioc_streamon,
- .vidioc_streamoff = vidioc_streamoff,
- .vidioc_log_status = vidioc_log_status,
- .vidioc_g_priority = vidioc_g_priority,
- .vidioc_s_priority = vidioc_s_priority,
- #ifdef CONFIG_VIDEO_V4L1_COMPAT
- .vidiocgmbuf = vidiocgmbuf,
- #endif
- #ifdef TUNER_FLAG
- .vidioc_g_tuner = vidioc_g_tuner,
- .vidioc_s_tuner = vidioc_s_tuner,
- .vidioc_g_frequency = vidioc_g_frequency,
- .vidioc_s_frequency = vidioc_s_frequency,
- #endif
- #ifdef CONFIG_VIDEO_ADV_DEBUG
- .vidioc_g_register = vidioc_g_register,
- .vidioc_s_register = vidioc_s_register,
- #endif
- };
- struct video_device cx25821_videoioctl_template = {
- .name = "cx25821-videoioctl",
- .fops = &video_fops,
- .minor = -1,
- .ioctl_ops = &video_ioctl_ops,
- .tvnorms = CX25821_NORMS,
- .current_norm = V4L2_STD_NTSC_M,
- };